Electrode-holder



R. H. CHADWICK. ELECTRODE HOLDER. APPLICATION FILED SEPT. 23. 1919.

1, 7'76. Patented July 27, 1920.

/7 20 Wmm Inventor- Ralph H. Chndwi ok, y 4. His Attorney.

Fort Wayne, in the county I of which the following is a such as are usedin soldering,

3lrconsequently 2 is aview,

'u'N TED. STATES.

PATENT OFFICE.

Yunnan n. cmmwrcxg or roar WAYNE, INDIANA, ASSIGNOR r0 GENERAL ELECTRICGQMPAZN'Y, A conronnrron 01E" NEW YORK.

' ELECTRODE-HOLDER.

Patented July 27,1920.

Application filed September-23, 1919: Serial no. a25,e4s.

To all whom it may concern: 4

Be it known that I RALPH H. CHADWIOK, a citizen of the United States,residing at of Allen, State of Indiana, have invented certain new anduseful Improvements in Electrode-Holders,

specification.

My invention relates to electrode holders for holding carbon electrodesand the like. More particularly my invention relates to manually,manipulated electrode holders welding and like operations depending onthe heat generated by resistance of the electrode to th passage of anelectric current. Y

The object of my; invention is to provide an improved holder of thistype which is rigid and not easily liable to depreciation through use,and one inwhich' supply or renewal parts may be readily applied. A stillfurther object of; my invention is to provide an improved arrangement ofparts whereby the power losses in the'parts of the electrode holderitself, are materially reduced. A

In accomplishing this end 1' have made use of a novel arrangement forsecuring together the mum of securing means are employed and littlepower is consumed in resistance jo1nts,.and the whole is quicklyassembled and disassembled.

Also, those parts which. are liable to 'be heated by eddy currents, suchas are induced where alternating currents are used in the electrode,rials, thus materially reducing the inherent losses incidental to use ofsuch electrodes.

For a more complete understanding of the nature and objects of myinvention referones should be had to the following detailed" descriptionwhen taken in connection with the accompanying drawing in which: 1Figure 1 is a-vi'ew, mainlyin-longitudinal section, of an electrodeholder constiucted in accordance with m invention; while Fig.

principal y diagrammatic, showinglghe application of my invention.

I 'ferring now to the drawings, 10 represents a-'sleeve for theelectrode holder having a split portion'lll so as to readily receive acarbon or other suitable electrode, as indicated at in Fig. 2. -Thesplit porof an insulated cable 18 several parts whereby a mini-,

are made of non-magnetic mate-.

tion 11 has a'screw 12 workingin a well known manner in the parallelcars 13, formed on opposite portions of the split sleeve, in order thatthe electrode may be properly secured therein. I The sleeve with, butprojecting away from it, the shank or elongated arm 14, which has anenlarged portion 15 adapted to be inserted in the cylindrical insulatingmember 16; the latter being suitably shaped for manual manipur lation bytheroperator using my device.

The enlarged portion 15 has a central bore arranged to receive the baredend 17 which cable is adapted to be connected as' for instance asindicated in 2 to one terminal of a transformer, electrode C. The manualmember, the electrode holder, and the cable are conveniently securedtogether b means of the screw' 20. The screw 20 penetrates the wall ofmember 16 in register wi h a threaded opening in the wall of theenlarged portion 15, and bears upon the bared end 17 in order to forceit into good electrical contact with the. metal of the electrode holder.I A coiled spring 21 is inserted in the end of the manual member 16,surrounding the cable 18 as it emerges from the end of member 16 inorder to takethe edge strain, due to flexure of the cable, off thatportion which is 'immediately'exterior to the member 16, as iswellunderstood; Such springs, have heretofore generally been are used tosupply the electrical ener y, such steel springs become unduly heatedcurrents induced. therein; able to use s rin rial such as p osp orbronze.-- a w The electrode holder, which I have deit is hencepreferscribed, is particularly adapted for solder- 4 welding, andlikeoperations through cable .18 to the electrode C, thence throu h the jobitself (not shown)-"to the for supplying current to the made of steel,but where alternating currentsy reason of the eddy of nonmagneticmateclip" whichis attached during the operation to some convenient pointon the job or j ob holding vise; and thence through the cable 23,attached to the cli to the other terminal of the source of M. F. Suchtransformer as has been indicated .at T

would be a step down transformer where the primary P was lightingcircuit.

he arm 14 is preferably of such length that very little heat isconducted from the electrode C back to the member 16, 'but my improvedmeans for uniting the elementsof the electrode holder avoids all use ofsolder in making electrical connections. Hence there are no' parts toget loose or joints to depreciate 01*. make bad electrical contact byreason of the heat conducted into the member- 16 softening the solderheretofore generally been-used. Moreover the use of but one securingmeans,

tapped onto a commercial as at 20, makes the removal of an old holder 10and the substitution of a new readily accomplished.

aving now described what is at present to me for carryingone very thebest means known out an embodiment of my invention, I would have itunderstood that such means are that I do not meanmerely illustrative andto belimited thereby to the exact details shown norin the choice ofrecognized equivalents except as defined in my claims hereuntoappended.-

What I claim as new and desire to secure by Letters Patent of the UnitedStatesis 1. An electrode holder, comprising a sleeve member providedwith a shank, an insulating member adapted. to receive a por-- tion ofsaid shank, said portion being formed to receive an electric cable to beelectrically connected. with said shank por! tion within said insulatingmember, and

unitary means for uniting in having a bared end her, and cable inoperative relation said insulating member, said shank and said cable. a

2. 'An electrode holder, comprising a sleeve member provided'with ashank, an insulating member adapted toreceive a portion of said shank,said portion being formed to receive 'an insulated electric cableportion adapted to be secured in electrical contact with said shank, anda securing means in the wall of said insulating member arran ed both tohold said shank in place in said insulating memher and to force said endportion of the cable into electrical contact with said shank.

3. An electrode holder, comprising a sleevemember provided with a shank,an insulating member adapted to receive a portion of said shank, saidportion being recessed to receive an insulated electric cable having abared end adapted to enter therecess formed in theshank portion withinsaid insulating member, and a screwpenetrating both the wall of saidinsulating. member and said shank and engaging said bared end ofthecable when in said recess. 4. An electrode holder for use inconnection with alternating currents, comprising an electrode. holdingsleeve provided with a shank, an insulating portion of said shank andadapted for manual manipulation, said shank being adapted to receive acable entering said member and. to make electric contact therewith, afunitary means forsecuiiing said shankf -memoperative relation, andnon-magnetic means secured in saidmember for avoiding edge-strain onsaidgcab'le at the point where it enters said membern In witness whereofI haveflhereunto set 1 my hand this 15th day of, September,1919.-

---RALPH Hi member enveloping a

